David friedheim



No. e|0,04|. Patented Aug. 30, I898. D. FHIEDHEIM. FIRE ESCAPE;(Application filed Nov. 8, 1897.

(,No Model.)

Nrrnn TA'IES DAVID FRIEDI-IEIM, OF NEW YORK, N. Y.

FIRE-ESCAPE.

' SPECIFICATION forming part of Letters Patent No. 610,041, dated August30, 1898.

Application filed November 8,1897. Serial No. 657,742. (No model.)

To all whom it may concern:

Be it known that I, DAVID FRIEDHEIM, of New York city, county and Stateof New York,

have invented an Improved Fire-Escape, of

vertically-extensible ladders opening in the v manner of lazy-tongs, andheld in their extended position bymeans of swinging upright rods.

The object of the present invention is to increase the stability andfacilitate the manipulation of the fire-escape.

In the accompanying drawings, Figure 1 is a Vertical cross-section of myimproved fireescape; Fig. 2 a side view of a portion of the same, andFig. 3 is a detail view.

a a are the members of three (more or less) connected pairs of lazytongs, each pair being composed of a ladder or and of aframe a,pivotally connected thereto at the central rung a which is maderevoluble. The lowermost ladder or, is pivoted above its lower end by afixed pivot 11 to the supporting wheeled truck A near one end thereofand is longer than the lowermost frame a, so that it projects below thetruck-body and can be readily mounted from the ground. The lowermostframe a, is guided at its lower end within the grooved side bars A oftruck A and is connected to a winding-drum d by a rope cl. Thus as therope is wound upon the drum the frame a is drawn with its lower endtoward ladder to, and in this way the entire system of ladders israised, while when the rope is slackened or unwound the ladders willcollapse.

By attaching the ladder Ct to the truck and making the frame a alonemovable, in contra distinction to making both the frame and laddermovable, the rigidity of the structure is greatly increased.

From the central rungs a depend swinging rods 6, having notched lowerends 0', adapted to engage the central rungs next below when thestructure is raised, while they are swung sidewise by ropes 6 when thestructure is lowered.

Each of the central rungs is provided in vertical alinement with rods 2with U-shaped guards f, the two shanks of which are coiled around therung at the sides of the rods 6, as at f, so as to form circularabutments f, Fig. 2, that prevent lateral displacement of the rods alongthe rungs, the two ends of the guards f being coiled around the rungsand forming continuous circular abutments upon each side of the rod 6.Thus these abutments prevent lateral displacement of the rods 6 in anyposition of the rung.

When the ladders are raised, the lower notched ends of rods 6 willengage the rungs a between the shanks of guards f, and thus the entirestructure will be maintained in its upright position. To collapse thestructure, the lowermost rung a is partly rotated by a brace 9, when allthe several rods 6 will be swung aside to release the rungs, and thenthe ladders may be lowered by revolving the drum.

What I claim is A fire-escape composed of a series of frames andladders, revoluble rungs for pivotally connecting the same, a series ofdepending stayrods, and U shaped guards having coiled ends that arewrapped aroundthe rungs at both sides of the stay-rods and formcontinuous lateral abutments, substantially as specified.

DAVID FRIEDHEIM. Witnesses:

F. v. BRIESEN, WILLIAM MILLER.

